He is always eager to study, and he becomes even more diligent as the exam approaches.

He usually takes care of his health.

I try to study at least one hour every day.

I study at the library every day.

He is studying earnestly.

He is enthusiastic about his work and always does his best.

He is enthusiastically working on a new project.

I set aside time for studying every day.

I have a math examination tomorrow.

He is my best friend.